[PATCH 1/2] drm/meson: fix primary plane disabling

[Kevin Hilman]

Neil Armstrong <narmstrong at baylibre.com> writes:

> The primary plane disable logic is flawed, when the primary plane is
> disabled, it is re-enabled in the vsync irq when another plane is updated.
>
> Handle the plane disabling correctly by handling the primary plane
> enable flag in the primary plane update & disable callbacks.
>
> Fixes: 490f50c109d1 ("drm/meson: Add G12A support for OSD1 Plane")
> Signed-off-by: Neil Armstrong <narmstrong at baylibre.com>

Reviewed-by: Kevin Hilman <khilman at baylibre.com>